Process of increasing and improving the resistance of spun goods from artificial-silk waste



Patented Feb. 21, 1928.

PATENT OFFICE.

UNITED. STATES JOSEPH ALEXIS GRAND, OF VILLEURIBANNE, FRANCE.

PROCESS OF INCREASING AND IMPROVING THE RESISTANCE OF SPUN GOODS FROMARTIFICIAL-SILK WASTE.

No Drawing.

The present invention is directed to a process for improving andincreasing the resistance of spun threads from artificial silk waste bythe provision of thoroughly mixing with the artificial silk wastevegetable fibers which have been previously treated to render theirphysical properties and chemical composition as nearly identical aspossible with the fibers of the silk waste.

In carrying out the process, the vegetable fibers are so selected as tobe of a thickness more or less corresponding to the thickness of thefibers of the silk waste and these vegetable fibers, in order that theirphysical and 1 5 chemical properties might be brought into more or lesscorrespondence with the similar properties of the fibers of the silkWaste, are initially mercerized and subjected to tension. Without theprovision of mercerization and tension, the vegetable fibers wouldreduce the silk appearance of the resultant threads and any subsequentdyeing of these threads would prove defective. Furthermore, thisprevious treatment of the vegetable fibers serves to bring the walls ofthe intracellular conduits of the fibers closer together and give thefibers an unalterable brilliancy and translucency.

Application filed March 2, 1927. Serial No. 172,217.

In the treatment of the vegetable fibers, such fibers will be previouslycleaned and ungummed to the state of pure cellulose and such vegetablefibers are formed as ribbons on spinning machines. The ribbons are thensubjected to' excess tension, washed and dried. The vegetable fibersthus provided are then carded and again formed into ribbons and maythereafter be mixed with the silk waste in proportions determined by thedesired resistance of the threads resulting from the mixture.

Having thus described the invention, what is claimed as new is:

A process for improving and increasing the resistance of spun threadsfrom artificial silk waste, consisting in subjecting Vegetable fibers toa process of mercerization and tension to similarize such fibers in agreater or less degree with the fibers of the artificial silk waste, andthen mixing such fibers of artificial silk waste and the mercerizedtensioned vegetable fibers.

\ In testimony whereof I have hereunto set my hand.

JOSEPH ALEXIS GRAND.

